Geoengineering Info Profile picture
Apr 29, 2023 7 tweets 6 min read Read on X
🚨PAPER🚨

#DAC of CO2 from the atm. is being explored as a tech. that can contribute to the goal of reaching #NetZero CO2 emissions.

A new study led by @DonglongFu1 showed that the use of zeolitic materials are feasible for DAC when it is integrated with H2O harvesting.
🧵
1/7 Image
"A combination of a commercially available desiccant, AQSOA-Z02A, and a mordenite-type zeolite (MOR) enables
continuous operation of a designed #DAC system comprised of two
parallel units with a regeneration temperature of 100°C," research finds.
2/7 Image
Furthermore, "the system
using pure #zeolite alone requires regeneration at temperatures between 200°C and 300°C."
3/7 ImageImage
"Techno-economic analyses of 12 process
scenarios reveal that the energy requirement of the best scenario
investigated is 71 GJ/tCO2, while the conventional pure zeolitebased system requires 200 GJ/tCO2."
#DAC
4/7 Image
Research declared that, "the optimized system gives a
cost between $246 and $568 per ton CO2 #captured, depending on
the energy costs, while system operates at sub-0°C temperatures or with
integration of water harvesting, respectively."
#DAC
5/7 ImageImage
📖 Read open-access study performed by @DonglongFu1 & Mark Devis funded by @Caltech entitled: "Toward the feasible direct air capture of
carbon dioxide with molecular sieves by water
management," here ⬇️
cell.com/cell-reports-p…

#DirectAirCapture
#CarbonDioxideRemoval

6/7

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More from @geoengineering1

Jun 16
🚨Tired of drowning in climate science papers?

🎧 Remove & Reflect Podcast does the digging for you—turning research & reports into short, sharp episodes on #CDR & #SRM.

YouTube:youtube.com/@removeandrefl…

Spotify:open.spotify.com/show/0dxuwkOuH…

Check out some must-listen episodes:🧵1/12
This episode dives into a radical proposal: using a buried nuclear explosion on the seafloor to break up basalt & speed up carbon removal via Enhanced Rock Weathering. The goal? Sequester 30 years of global CO2.

2/12
This episode unpacks a preprint by Hosea Olayiwola Patrick drawing lessons from COVID-19 for solar geoengineering.

3/12
Read 13 tweets
Jun 15
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (09 June - 15 June 2025):

🔗:

🧵0/17
@InSoilClimate secured its largest funding to date through a €100 million agreement with Key Carbon, accelerating regenerative agriculture and carbon credit generation across Europe.

1/17
insoil.com/blog/2025/06/1…
Canada Nickel partnered with NetCarb to scale mineral carbon sequestration at Crawford. NetCarb's tech could boost CO₂ uptake 10‑fold to 10–15 Mt/year, vs 1.5 Mt via Canada Nickel's proprietary IPT Carbonation.

2/17
prnewswire.com/news-releases/…
Read 20 tweets
Jun 11
🚨A new study [preprint] shows that injecting sulfur at 50km could make #SolarGeoengineering much safer.

It cools the planet more effectively, speeds ozone recovery & avoids stratospheric disruptions. This could be done using a fleet of clean, reusable H2 rockets.

DETAILS🧵1/10 Image
2/ SAI involves spraying SO₂ into stratosphere, where it forms aerosols that reflect sunlight—cooling Earth. It mimics volcanic eruptions like Mt. Pinatubo (1991), which temporarily cooled the planet.

But current “SAI models” inject SO2 at a rate of 10 Tg/yr at ~25km altitude.
3/ But Injecting at 25 km creates problems

Aerosols accumulate in the tropical lower stratosphere, causing up to 6°C warming in that layer.

This disturbs jet streams, increases stratospheric water vapor, and delays the ozone layer’s recovery—by 25–55 years in Antarctica. Image
Image
Image
Read 11 tweets
Jun 8
📝💡𝐖𝐞𝐞𝐤𝐥𝐲 𝐂𝐃𝐑 𝐇𝐢𝐠𝐡𝐥𝐢𝐠𝐡𝐭𝐬💡📝

📰 Here's your round-up of top #CarbonDioxideRemoval News / Developments from this week (02 June - 08 June 2025):

🔗:

🧵0/21
@capture_air raised $50M in Series A funding to scale its California-based DAC tech.

1/21
carbonherald.com/aircapture-sec…
UK fintech Wise pledged £500K to support nature-based and hybrid CDR in Latin America and Asia-Pacific.



2/21carbon-pulse.com/404067/
Read 24 tweets
Jun 6
🚨A new study has revealed for the first time that ancient carbon, stored in landscapes for thousands of years or more, can find its way back to the atmosphere as CO₂ is released from the surfaces of rivers at a rate of 1.2 billion tonnes per year.

Details🧵1/8 Image
2/ To understand the true source of river CO₂, researchers compiled a global dataset of 1,195 radiocarbon measurements of dissolved inorganic carbon (DIC), CO₂ & CH₄ from rivers & streams.

This let them determine whether the emitted carbon was modern—or much older. Image
3/ Using radiocarbon signatures (¹⁴C), they found that 59% of river CO₂ emissions come from "old" C—millennia-old soil carbon & even petrogenic carbon (rock-derived, >55,000 years old)

Only ~41% came from recent biological sources like plants & microbes (decadal carbon). Image
Read 9 tweets
Jun 3
🚨🗓Carbon Removal Events Calendar by Andrew Lockley!🗓🚨

Here's a list of what's coming up this week (03 June - 09 June 2025) in the field of #CarbonDioxideRemoval:

🔗:

🧵1/13 teamup.com/kshqbfhrqkw36s…Image
EVENT—Carbon Removal Summit: Business Value in a Shifting Landscape by CUR8 Events

🗓03 June 2025 | London, England
🔗

2/13lu.ma/hn94fhf4
EVENT—Mastering Carbon Credit Contracts for Corporate Buyers and Suppliers by Ceezer

🗓03 June 2025 | Online
🔗

3/13insight.ceezer.earth/mastering-carb…
Read 14 tweets

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